Working on taller stance and it is definitely working. But, I am hitting some thin shots and topping the ball like you said on full shots, especially short irons, but the added power and especially direction are there when I do it right. Even when I top it, the ball heads toward the target.
Backward tilt seems to help reduce the topping. Struggling with getting the right amount of backward tilt though. Another factor is that I have always flighted all my clubs lower than good players that I have played with.

To know how much backwards tilt is the right amount you just watch your ball. If the ball start right it is too much. Left too little. Ideally you want the til from firing the lower body but if you have to manually tilt then do so. If you have been over the top then favor the ball going right. Yes, you will hit pushes and push fades. Once you get it then turn more and you will not tilt too much and hit it straight. You turn by going to the touch the legs position.